APA (7th ed.) Citation

Kristensen, N. P. (1999). Lepidoptera, moths and butterflies. W. de Gruyter.

Chicago Style (17th ed.) Citation

Kristensen, Niels P. Lepidoptera, Moths and Butterflies. Berlin ; New York: W. de Gruyter, 1999.

MLA (9th ed.) Citation

Kristensen, Niels P. Lepidoptera, Moths and Butterflies. W. de Gruyter, 1999.